4. Rate Right. Opportunity Cost is everything. You're working 12 hours on site and you only get about 90 minutes of focused time in the evening. If you spend 45 minutes of that window doing manual data entry, tweaking notion, or reading every single email, the opportunity cost isn't just your time. The cost is that you didn't spec out a new feature for builder, or you didn't review Susan's sales pipeline. When your time is the tightest bottleneck, doing low-value grunt work is the most expensive mistake you can make.